Effect of EGFR signaling on IRF1-induced CXCL10 production. Top, respiratory viruses (e.g., influenza virus, RV, and RSV) stimulate airway epithelial NADPH oxidase (Nox), metalloproteinase (MP), and ligand-induced activation of EGFR, which leads to IL-8 production. EGFR activation suppresses IRF1-induced CXCL10. Bottom, in the presence of EGFR inhibition (e.g., gefitinib and AG-1478), IRF1-induced CXCL10 is increased.